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AU766342B2 - Coffee machine for brewing coffee powder pre-packed in a cartridge - Google Patents
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AU766342B2 - Coffee machine for brewing coffee powder pre-packed in a cartridge - Google Patents

Coffee machine for brewing coffee powder pre-packed in a cartridge Download PDF

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Publication number
AU766342B2
AU766342B2 AU46211/01A AU4621101A AU766342B2 AU 766342 B2 AU766342 B2 AU 766342B2 AU 46211/01 A AU46211/01 A AU 46211/01A AU 4621101 A AU4621101 A AU 4621101A AU 766342 B2 AU766342 B2 AU 766342B2
Authority
AU
Australia
Prior art keywords
cartridge
chamber
perforator
coffee machine
brewing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
AU46211/01A
Other versions
AU4621101A (en
Inventor
Arthur Schmed
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Fianara International BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fianara International BV filed Critical Fianara International BV
Publication of AU4621101A publication Critical patent/AU4621101A/en
Application granted granted Critical
Publication of AU766342B2 publication Critical patent/AU766342B2/en
Assigned to SAECO IPR LIMITED reassignment SAECO IPR LIMITED Alteration of Name(s) in Register under S187 Assignors: FIANARA INTERNATIONAL B.V.
Assigned to KONINKLIJKE PHILIPS ELECTRONICS N.V. reassignment KONINKLIJKE PHILIPS ELECTRONICS N.V. Alteration of Name(s) in Register under S187 Assignors: SAECO IPR LIMITED
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/24—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure
    • A47J31/34—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure
    • A47J31/36—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means
    • A47J31/3604—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means with a mechanism arranged to move the brewing chamber between loading, infusing and ejecting stations
    • A47J31/3623—Cartridges being employed
    • A47J31/3628—Perforating means therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/24—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure
    • A47J31/34—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure
    • A47J31/36—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means
    • A47J31/3604—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means with a mechanism arranged to move the brewing chamber between loading, infusing and ejecting stations
    • A47J31/3623—Cartridges being employed

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Apparatus For Making Beverages (AREA)
  • Packages (AREA)

Description

f
V',
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT
ORIGINAL
Applicant(s): FIANARA INTERNATIONAL B.V.
Actual Inventor(s): Arthur Schmed
D
Address for Service: PATENT ATTORNEY SERVICES 26 Ellingworth Parade Box Hill Victoria 3128 Australia Title: COFFEE MACHINE FOR BREWING COFFEE POWDER PRE-PACKED IN A CARTRIDGE Associated Provisional Applications: No(s).: The following statement is a full description of this invention, including the best method of performing it known to me/us:i~ll la- COFFEE MACHINE FOR BREWING COFFEE POWDER PRE-PACKED IN A CARTRIDGE The present invention refers to a coffee machine for brewing coffee powder pre-packed in a cartridge, comprising a perforator member for creating at least one opening in the cartridge.
In order to brew coffee powder pre-packed in a cartridge, up to now, mostly semi-automatic coffee machines are used in which the cartridge has to be inserted into a sieve holder with its cap facing downwards, whereby the sieve holder, thereafter, has to be l0manually fixed to the coffee machine. The coffee machine comprises a brewing pin member provided with radial outlet openings for the S brewing water, located in the region of the portion pack holder fixing. The brewing pin member penetrates the bottom of the cartridge when the sieve holder is fixed to the coffee machine. The 15 sieve holder itself is provided, at its bottom, with a plurality of projections. These projections penetrate the cap of the cartridge and perforate it, as soon as brewing water is fed to the sieve holder, whereby the cartridge is pressed against these projections under the influence of the hydraulic overpressure. At the 20 consecutive brewing operation, the brewing water is fed into the 0e cartridge by the brewing pin member, thus flowing through the coffee powder contained therein and escaping from the interior of the cartridge through the perforation in the cap. The freshly brewed coffee beverage can escape through outlets located at the lower side of the sieve holder. Such a coffee machine is disclosed, for example, in the document EP 0,891,734.
Practice has shown that the cross section of the brewing pin member that is relevant for the brewing water to escape the brewing pin member is relatively quickly decreased and fully blocked, respectively, under the influence of contamination. The reasons T V 2 therefor are, for example, coffee fat, coffee particles as well as lime in the brewing water. However, with increasing contamination of the brewing pin member, the quality of the brewed coffee beverage decreases. From a hydraulic point of view, a further problem adhering to such brewing pin members is that so-called dead volumina occur in the interior of the cartridge such that portions of the coffee powder are not or insufficiently exposed to the flow of brewing water.
A further disadvantage of the mentioned brewing pin member consists in the fact that it leaves a relatively large puncture in the cartridge through which brewed coffee powder can escape once the brewing pin member is retracted, thus contaminating the coffee machine. This problem is particularly pronounced if the cartridge is put into the coffee machine such that the rear portion of the cartridge to be perforated extends vertically downwards, with the result thaL Lhe brewed coffee powder can fall out of the cartridge under the influence of gravity, once the brewing pin member is retracted. Moreover, during the brewing operation and caused by the excess pressure in the interior of the cartridge, coffee powder escapes from the cartridge through a gap surrounding the brewing pin.
The document EP 0,521,187 discloses an apparatus for extracting closed cartridges. The apparatus is provided with an extraction head member, comprising a grid member for distributing the brewing water. The bottom side of that grid member is provided with protrusions adapted to perforate the cap of the cartridge to be extracted. The brewing water is supplied from the top through the cap of the cartridge. The latter one is bent under the influence of the pressure of the brewing water, with the result that an annular gap is created between the particular protrusion and the opening created therewith. Through that gap, the brewing water can -3get into the cartridge. The brewed coffee beverage is said to frow out downwards through the above mentioned outlet 7rid member. io'Tever i is not quite clear how the brewed coffee beverage can escaoe the interior of the cartridge, because the protrusions extend through the therewith created openings. Barely leaving any clearance between the particular protrusion and the opening created therewith.
The above references to and descriptions of prior proposals or products are not intended to be, and are not to be construed as, statements or admissions of common general knowledge in the art in Australia.
It is an object of the invention to improve a coffee machine for brewing coffee powder pre-packed in a cartridge in such a way that can be of simpler design.
It is another object of the invention to provide a coffee machine for brewing coffee powder pre-packed in a cartridge in such a way that it can be less susceptible to contamination.
It is a still further object of the invention to provide a coffee machine for brewing coffee powder pre-packed in a cartridge in such a way that it can be operated generally more reliably.
20 In order to meet these and other objects, the present invention provides a coffee machine for brewing coffee powder prepacked in a cartridge that comprises a perforator means for creating at least one opening in the cartridge containing the coffee powder. Thereby, the perforator means is adapted to create the opening in the cartridge bottom of the cartridge.
The perforator means has a cross sectional area that is smaller than the cross sectional area of the opening created in the cartridge bottom of the cartridge. Further provided are means S for feeding brewing water under overpressure through the free 30 cross sectional area of the opening in the cartridge bottom of the cartridge into the interior of the cartridge.
In the following, an embodiment of the apparatus according to the invention will be further described, with reference to the accompanying drawings, in which: 4 Fig. 1 shows the bearing assembly during the closing of the chamber; Fig. 2 shows the brewing assembly in the brewing position; Fig. 3 shows a schematic view of a brewing assembly as wellas of a cartridge in the initial state; Figs. 4a and 4b each show an enlarged view of a puncturing member; and Fig. 5 shows an alternative embodiment of a perforator member.
Fig. 1 shows a schematically illustrated brewing assembly which is in the present example part of a fully automatic coffee machine for brewing coffee powder pre-packed in a cartridge 10. The brewing assembly comprises a brewing chamber housing 1 in which are contained two chamber portions 2, 3 delimiting the real brewing chamber 14. The upper portion 3 of the brewing chamber 14 is axially movable with regard to the lower portion 2 of the brewing chamber 14. The upper portion 3 of the brewing chamber 154 is axially movable with regard to the lower portion 2 of the brewing chamber 14, whereby the upper portion 3 is biased by a spring 4 pressing the upper portion 3 of the chamber into .the position shown in Fig. 1 against a stop member. For thei 1j alsn Forreigchme closing the brewing chamber 14, first, the brewing chamber housing 1 is swivelled and then raised against a piston member not shown in the view according to Fig. 1. The drive means required for moving the brewing chamber housing 1 are not shown. The top side of the upper portion 3 of the chamber is provided with a circumferential sealing member 6 on which is resting the edge 12 of the cartridge containing the coffee powder to be brewed. The feeding of the cartridge 10 into the brewing chamber 14 is performed by any suitable means (not shown). At the bottom of the 5 brewing chamber 14, three perforator members 8 in the shape of inclined knives are located which are adapted to perforate the bottom 7 of the cartridge 10. However, 5 in this sectioned view, only two of the three perforator members 8 are visible.
Fig. 2 shows the brewing assembly in the brewing position. For this purpose, the brewing chamber housing 1 has been swivelled and raised against the piston member visible in this illustration whose front side is provided with a plurality of projections 16 as well as with a circumferential sealing member 18. Upon raising the brewing chamber housing 1, the piston member 15 enters the brewing chamber housing 1 and abuts on the upper portion 3 of the brewing chamber such that the latter is pressed downwards, together with the cartridge 10, against the force of the spring 4. Thereby, the perforator members 8 penetrate bottom 7 of the cartridge 10 from beneath and provide the bottom 7 with slots S. Due to the fact that the knife-shaped perforator members 8 are inclined, the bottom 7 of the cartridge 10 is provided with elongated slots S that are longer than the corresponding perforator member 8. In the upper part of the brewing chamber housing 1, the lower side of the upper portion 3 of the brewing chamber abuts o against the upper side of the lower portion 2 of the brewing chamber. For feeding the brewing water, a channel 9 is provided that opens centrally into the bottom of the brewing chamber 14.
In the upper part of the brewing chamber housing 1, the sealing member 18 of the piston member 15 sealingly engages the edge portion 12 of the cartridge 10, and simultaneously the sealing member 6 of the upper portion 3 of the brewing chamber sealingly engages the lower side of the edge portion S. 12 of the cartridge, such that the region above the cartridge is hydraulically sealed with regard to a rear portion of the cartridge which includes the cartridge bottom 7. As can be seen from the illustration of Fig. 2, the inner side of the brewing chamber 14 is adapted to the shape of the cartridge 6 such that no significant gap between outside of the cartridge and inside of the brewing chamber exists.
Once the cartridge has been perforated at its rear side through bottom 7 and once the region above the cartridge has been sealed with regard to the rear portion of the cartridge, brewing water can be fed through the channel 9. This brewing water creates a hydraulic overpressure in the brewing chamber 14 which presses the.
cartridge upwards against the projections 16 of the piston member such that the projections 16 of the piston member 15 penetrate the cap 11 of the cartridge 10 and perforate it. Now, the brewing water can flow into the interior of the cartridge 10 through the slots S created by the perforator members 8. Due to the fact that the water enters the cartridge 10 from the outside and is not fed through a brewing pin member from the interior, as is usual up to 15 now, it can be ensured that no coffee powder contaminating the *coffee machine is flushed out of the cartridge 10 during the brewing operation. The brewed coffee beverage can escape through the cap 11 of the cartridge 10 and flows through channels 17 provided in the piston member 15 into the outlet channel 20, from where it flows to a coffee beverage outlet (not shown).
After the brewing of the coffee powder portion, the brewing chamber housing 1 is moved downwards again and swiveled into the initial position. Now, the cartridge 10 containing extracted coff* fee powder is ejected from the brewing chamber housing 1 (Fig. 3) 25 by not further shown means and fed to a collecting container. Also during the removal of the cartridge 10, it is advantageous if its bottom is not provided with one or several openings having a large cross section through which coffee grounds could fall out during ejecting the cartridge, or through which residual water containing coffee grounds could escape from the cartridge.
7 The Figs. 4a and 4b show a perforator member 8 in an enlarged illustration, whereby Fig. 4a shows the perforator member 8 together with the rear portion 10a of the cartridge prior to the real brewing operation, and Fig. 4b during the real brewing operation. Under the influence of the hydraulic overpressure in the brewing chamber during the brewing operation, the brewing chamber portions are pressed apart from each other, resulting in a relative movement between cartridge and perforator members in the amount of up to 1 Millimeter. Due to the inclined configuration of the perforator members 8, however, this is of no influence on the i inlet cross section of the slot S available to the brewing water.
S.o While the brewing water can flow into the cartridge in the situation shown in Fig. 4a predominantly through that portion of the slot S which is at the front side of the perforator member, the brewing water can flow into the cartridge in the situation shown in Fig. 4b predoaminaiiLly through that portion of the slot S which is at the rear side of the perforator member.
By perforating the bottom of the cartridge 10 at three loca- S tions distributed along a circle, hydraulic dead volumina in the interior of the cartridge 10 are avoided to the greatest extent and the coffee powder received in the cartridge is homogeneously exposed to the brewing water.
Fig. 5 shows an alternative embodiment of perforator members 21a, 21b and 21c that are located on an annular base member Again, the perforator members 21a, 21b and 21c are evenly distributed along a circle. Each perforator member, for example also the perforator member 21b, comprises a frame member 22 having trapezoidal shape with an inclined, upper cutting edge 25. As can be seen in the view of the left perforator member 21a, the cutting edge 25 forms the upper end of an also inclined cutting face 27.
At the tip of the particular perforator member 21b, a triangular 8 perforator face 26 is located. The frame member 22 constituting the particular perforator member 21b is provided with a centrally located aperture 23. As soon as the perforator members 21a, 21b and 21c have perforated the cartridge, brewing water can be supplied to the interior of the cartridge through the apertures 23.
It is understood that the shown brewing assembly is for example only and is not to be considered as final at all. For example, instead of providing perforator members fixedly mounted to the bottom of the brewing chamber, perforator members could be prothat are moved into the brewing chamber by drive means for Perforating the cartridge and are retracted, after perforating it, back into a rest position. Another embodiment can be seen in a design in which the perforator members are guided and moved in such a way that they create, upon perforating the cartridge, an opening that is larger than the perforator members themselves. Also the number, arrangement and design of the perforator members could vary within a wide region. For example, also perforator members could be used that have a kite shaped design or have the shape of a double cone.
The advantages of the shown assembly both generally and as compared to known assemblies provided with a brewing pin member can be summarized as follows: 00. Minor contamination of the coffee machine due to small perfora- 0 0* tions; ee No flushing of coffee powder: No hydraulic dead volumina in the interior of the cartridge; 0 No hydraulic dead volumina in the interior of the cartridge; 9 Homogenous flow of brewing water through the coffee powder and homogenous brewing thereof; No blocking of apertures for feeding brewing water, thus no requirement for cleaning the same-; Insensitive with regard to expansions of the brewing chamber and displacement of the cartridge, respectively, caused by a hydraulic overpressure in the brewing chamber; a S Well defined entry openings for the brewing water; Simple design and low manufacturing costs.
a a

Claims (8)

  1. 2. Coffee machine according to claim i, wherein said perforator means 5 includes inclined perforator members which each create an opening whose cross section is greater than the mean cross section of the respective perforator member.
  2. 3. Coffee machine according to claim 1, wherein said perforator means includes a frame shaped perforator member having a centrally located cut-out through which the brewing water is fed into the interior of said cartridge means.
  3. 4. Coffee machine according to claim 1, wherein said perforator means includes a trapezoidal perforator member, having an inclined cutting edge means directed towards the cartridge bottom of said cartridge means. Coffee machine according to claim i, wherein said perforator means includes a kite shaped perforator member.
  4. 6. Coffee machine according to claim i, wherein said perforator means includes a perforator member in the shape of a double cone. re r 11
  5. 7. Coffee machine according to any preceding claim, including a chamber for receiving said cartridge means as well as perforator members Projecting or movable into said chamber, means for perforating a front portion of said cartridge means and means for hydraulically sealing the said front portion of said cartridge means with regard to a rear portion of said cartridge means, which includes said cartridge bottom, whereby said chamber is adapted to be hydraulically subjected to overpressure in such a way that the brewing water flows through said openings into the truhsi pnnsit h 0 interior of said cartridge means.
  6. 8. Coffee machine according to claim i, and further including a movable portion holder which is provided with a plurality of projections for perforating the front portion of said cartridge means, whereby said perforator means are arranged on the coffee machine in the region of the portion holder in such a way that the cartridge bottom of said cartridge means is perforated upon moving said portion holder into its operative position.
  7. 9. Coffee machine according to claim 7, wherein said chamber is defined by chamber portions of said coffee machine, and wherein said coffee machine further includes a closure member for closing said chamber and for hydraulically sealing the front portion of said cartridge means with Sregard to the rear portion of said cartridge means, said perforator means being located in the region of the bottom of said chamber and drive means are provided for moving at least one of: said chamber portions defining said chamber; said closure member; and said perforator means. 12 Coffee machine according to claim 9, wherein said chamber portions defining said chamber and/or said closure member are axially movably arranged, and wherein said cartridge means is movable with regard to said perforator means by the axial movement upon closing said chamber in such a way that said perforator means penetrate said cartridge means.
  8. 11. Coffee machine according to claim 9 or 10, wherein there are two of said chamber portions comprised by an upper chamber portion and a lower chamber portion, and wherein said coffee machine further includes a brewing chamber housing means receiving said two chamber portions defining said chamber, the upper chamber portion being provided for vertically supporting said cartridge mans and being biased by means -of a spring means in such a way that it is axially movable, upon closing said chamber, with regard to the lower chamber portion and against the force iii 15 of said spring means. S 12. Coffee machine according to claim 7, wherein the inner shape of said chamber essentially corresponds to the outer shape of said cartridge oooe o- means. oooo Dated this 20th day of August 2003 PATENT ATTORNEY SERVICES Attorneys for FIANARA INTERNATIONAL B.V. •ooo •go°
AU46211/01A 2000-06-14 2001-05-22 Coffee machine for brewing coffee powder pre-packed in a cartridge Expired AU766342B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH11732000 2000-06-14
CH1173/00 2000-06-14

Publications (2)

Publication Number Publication Date
AU4621101A AU4621101A (en) 2001-12-20
AU766342B2 true AU766342B2 (en) 2003-10-16

Family

ID=4561378

Family Applications (1)

Application Number Title Priority Date Filing Date
AU46211/01A Expired AU766342B2 (en) 2000-06-14 2001-05-22 Coffee machine for brewing coffee powder pre-packed in a cartridge

Country Status (20)

Country Link
US (1) US6499388B2 (en)
EP (1) EP1163869B1 (en)
JP (1) JP3655216B2 (en)
CN (1) CN1165257C (en)
AR (1) AR028953A1 (en)
AT (1) ATE225627T1 (en)
AU (1) AU766342B2 (en)
BR (1) BR0102375A (en)
CA (1) CA2348252A1 (en)
CZ (1) CZ20011814A3 (en)
DE (1) DE50100037D1 (en)
DK (1) DK1163869T3 (en)
ES (1) ES2184726T3 (en)
HK (1) HK1041186B (en)
HU (1) HUP0102449A3 (en)
MX (1) MXPA01005954A (en)
PL (1) PL348078A1 (en)
PT (1) PT1163869E (en)
RU (1) RU2220639C2 (en)
TR (1) TR200201609T3 (en)

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